GB1493238A - Compositions for tubular heating elements - Google Patents

Compositions for tubular heating elements

Info

Publication number
GB1493238A
GB1493238A GB23053/76A GB2305376A GB1493238A GB 1493238 A GB1493238 A GB 1493238A GB 23053/76 A GB23053/76 A GB 23053/76A GB 2305376 A GB2305376 A GB 2305376A GB 1493238 A GB1493238 A GB 1493238A
Authority
GB
United Kingdom
Prior art keywords
additive
magnesium oxide
june
tubular heating
fused
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB23053/76A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Publication of GB1493238A publication Critical patent/GB1493238A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Resistance Heating (AREA)
  • Non-Adjustable Resistors (AREA)
  • Inorganic Insulating Materials (AREA)
  • Lubricants (AREA)

Abstract

1493238 Refractory composition; magnesium oxide DYNAMIT NOBEL AG 3 June 1976 [7 June 1975] 23053/76 Headings ClA and ClJ A composition suitable for compaction to form the electrically insulating material of a tubular heating element, comprises granular fused magnesium oxide and a refractory oxidic additive, the additive having sliding properties such that it is capable of reducing destruction of the magnesium oxide crystals during compaction, and the additive also having a topochemical reactivity such that it is capable of reacting with the active conductivity centres at the surface of one or more adjacent magnesium oxide crystals at temperatures of from 800-1050‹ C. Preferably the additive is sintered, or fused and quenched, lying within the system the grains of the additive consisting of amorphous and microcrystalline to cryptocrystalline phases, the maximum crystal size in the crystalline fraction being 10 microns. Preferably the additive consists of 10-35% by wt. Al 2 O 3 , from 40-75% by wt. SiO 2 and 5-25% by wt. MgO, and is present in an amount of 0À05-5% by weight.
GB23053/76A 1975-06-07 1976-06-03 Compositions for tubular heating elements Expired GB1493238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2525441A DE2525441C3 (en) 1975-06-07 1975-06-07 Electrically insulating filling for an electric tubular heater

Publications (1)

Publication Number Publication Date
GB1493238A true GB1493238A (en) 1977-11-30

Family

ID=5948526

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23053/76A Expired GB1493238A (en) 1975-06-07 1976-06-03 Compositions for tubular heating elements

Country Status (11)

Country Link
US (1) US4048119A (en)
JP (1) JPS51150094A (en)
AT (1) AT373117B (en)
CA (1) CA1093295A (en)
DE (1) DE2525441C3 (en)
ES (1) ES448610A1 (en)
FR (1) FR2313836A1 (en)
GB (1) GB1493238A (en)
IT (1) IT1061658B (en)
SU (1) SU676195A3 (en)
YU (1) YU39767B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2525441C3 (en) 1975-06-07 1981-04-16 Dynamit Nobel Ag, 5210 Troisdorf Electrically insulating filling for an electric tubular heater
JPS5715393A (en) * 1980-06-30 1982-01-26 Matsushita Electric Ind Co Ltd Sheathed heater
JPS5725689A (en) * 1980-07-22 1982-02-10 Nippon Dennetsu Kk Method of producing insulating powder for heater
JPS59175585A (en) * 1983-03-26 1984-10-04 タテホ化学工業株式会社 Electrically insulating filling material of high temperaturesheathed heater
JPS59215690A (en) * 1983-05-20 1984-12-05 タテホ化学工業株式会社 Electric insulating filler material of high temperature sheathed heater
DE3438413A1 (en) * 1984-10-19 1986-04-24 Elpag Ag Chur, Chur Tubular radiator
DE3440006A1 (en) * 1984-11-02 1986-05-07 Buderus Ag, 6330 Wetzlar HEATING BOILER
JPS61214389A (en) * 1985-03-19 1986-09-24 タテホ化学工業株式会社 Electric insulation filling material for sheathed heater
FR2634478B1 (en) * 1988-07-25 1992-08-28 Financ Cetal Sarl PROCESS FOR THE MANUFACTURE OF A BORON NITRIDE INSULATING BAR, MAINLY USED IN PROTECTED HEATING ELEMENTS, AND THE BAR THUS OBTAINED
EP2238175B1 (en) * 2008-01-29 2011-12-14 LANXESS Deutschland GmbH Nitrile rubbers which optionally contain alkylthio terminal groups and which are optionally hydrogenated

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3201738A (en) * 1962-11-30 1965-08-17 Gen Electric Electrical heating element and insulation therefor
FR1402630A (en) * 1963-08-06 1965-06-11 Jenaer Glaswerk Schott & Gen Process for obtaining heat-resistant crystalline masses for glazing and sintering and in the powder state
DE1220094B (en) * 1963-08-06 1966-06-30 Jenaer Glaswerk Schott & Gen Use of glass powder mixtures in the production of crystalline, heat-resistant coating and fusing compounds
US3355802A (en) * 1966-01-03 1967-12-05 Gen Electric Method of making electrical heating elements
FR1535804A (en) * 1966-07-22 1968-08-09 Corning Glass Works Improvements in manufacturing processes for glass-ceramic articles, and articles obtained
US3592771A (en) * 1968-02-01 1971-07-13 Gen Electric Tubular heating elements and magnesia insulation therefor and method of production
US3583919A (en) * 1968-02-01 1971-06-08 Gen Electric Electrical insulating refractory composition of fused magnesium oxide and silica or alkali metal silicates
US3477058A (en) * 1968-02-01 1969-11-04 Gen Electric Magnesia insulated heating elements and methods of production
US3622755A (en) * 1969-03-21 1971-11-23 Gen Electric Tubular heating elements and magnesia insulation therefor and method of production
DE1921789C3 (en) * 1969-04-29 1975-02-20 Dynamit Nobel Ag, 5210 Troisdorf Process for the production of pipe fillings for electric radiators
DE2363790C3 (en) * 1973-12-21 1981-12-17 Dynamit Nobel Ag, 5210 Troisdorf Process for the production of a thermally conductive, highly refractory, electrically insulating embedding compound for electric radiators
DE2525441C3 (en) 1975-06-07 1981-04-16 Dynamit Nobel Ag, 5210 Troisdorf Electrically insulating filling for an electric tubular heater

Also Published As

Publication number Publication date
ES448610A1 (en) 1977-07-01
JPS51150094A (en) 1976-12-23
ATA413076A (en) 1983-04-15
JPS6132790B2 (en) 1986-07-29
SU676195A3 (en) 1979-07-25
CA1093295A (en) 1981-01-13
DE2525441C3 (en) 1981-04-16
IT1061658B (en) 1983-04-30
DE2525441B2 (en) 1980-06-26
DE2525441A1 (en) 1976-12-16
FR2313836B1 (en) 1981-12-31
AT373117B (en) 1983-12-27
YU39767B (en) 1985-04-30
YU112576A (en) 1982-06-30
US4048119A (en) 1977-09-13
FR2313836A1 (en) 1976-12-31

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940603